[PATCH] virtio: Fix compilation issue on freebsd

This patch fixes the compilation issue on freebsd:

/root/qwan/tmp/dpdk_org/lib/librte_pmd_virtio/virtio_ethdev.c: In function 'virtio_resource_init':
/root/qwan/tmp/dpdk_org/lib/librte_pmd_virtio/virtio_ethdev.c:1071:56: error: unused parameter 'pci_dev' [-Werror=unused-parameter]  static int virtio_resource_init(struct rte_pci_device *pci_dev)
                                                        ^
cc1: all warnings being treated as errors

Signed-off-by: Changchun Ouyang <redacted>
---
 lib/librte_pmd_virtio/virtio_ethdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c b/lib/librte_pmd_virtio/virtio_ethdev.c
index 9eb0217..88ecd57 100644
--- a/lib/librte_pmd_virtio/virtio_ethdev.c
+++ b/lib/librte_pmd_virtio/virtio_ethdev.c

@@ -1068,7 +1068,7 @@ virtio_has_msix(const struct rte_pci_addr *loc __rte_unused)
 	return 0;
 }
 
-static int virtio_resource_init(struct rte_pci_device *pci_dev)
+static int virtio_resource_init(struct rte_pci_device *pci_dev __rte_unused)
 {
 	/* no setup required */
 	return 0;

-- 
1.8.4.2